There is no single test to definitively diagnose PCOS. The 3 main features of PCOS are:
<ul>
 	<li>Irregular periods – which means your ovaries do not regularly release eggs (ovulation)</li>
 	<li>Excess androgen – high levels of “male” hormones in your body, which may cause physical signs such as excess facial or body hair and acne</li>
 	<li>Polycystic ovaries – your ovaries become enlarged and contain many fluid-filled sacs (follicles) that surround the eggs</li>
</ul>
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If you have at least 2 of these features, you may be diagnosed with PCOS. Your doctor must use a compilation of tests in order to determine if you meet the criteria for PCOS and also to exclude other endocrine conditions.
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Testing for PCOS includes a blood test to check for androgen levels, glucose or insulin levels, and other hormones (thyroid, prolactin, adrenal hormones). Women should also have an ultrasound to look at the ovaries to see if they meet PCOS criteria, specifically looking to count the number of small fluid-filled sacs known as “follicles".